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THERMODYNAMIC CALCULATIONS OF SELF-DIFFUSION PARAMETERS IN IRON
Corresponding Author(s) : Ho Khac Hieu
UED Journal of Social Sciences, Humanities and Education,
Vol. 9 No. 2 (2019): UED JOURNAL OF SOCIAL SCIENCES, HUMANITIES AND EDUCATION
Abstract
In this paper, basing on the cBΩ in thermodynamics, we have investigated the self-diffusion mechanism in iron metal. We derived the analytical expressions of thermodynamic quantifiers, i.e, self-diffusion coefficient, activation Gibbs free energy, activation volume, activation entropy, and activation enthalpy. Numerical calculations have been performed for self-diffusion of iron showing a good agreement of diffusion coefficient with experimental data. This confirms the validity of the thermodynamic cBΩ model on the investigation of self-diffusion in iron. Simultaneously, we determined the values of self-diffusion parameters in α-iron in temperature range 500-1200 K. Our results show that these diffusion parameters are weak-dependent on temperature.
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